I tell him I have been scared by him
How does he react to that, HappyDoll? It's really quite serious to have your spouse tell you they are afraid of you. Any person who isn't shocked by that and desperate not to frighten a loved one anymore must clearly get something out of it, or prefer to keep hurting their loved one rather than question their own behaviour.
Has anyone ever had success through counselling? And do you ever doubt that you are thinking rationally and that the books have influenced you as much as your partner?
I had a year of couples counselling. Stbxh got worse during that time. The counselling was a very confusing time for me, since I was so desperate to improve things, and so wanted to take on board all the things that stbxh said made him angry and to change my own behaviour accordingly. But the things he said in counselling just made less and less sense. And because I was in counselling, I felt pressured to take his (frankly ridiculous - I can give examples if you want to judge for yourself) feelings on board. The counsellor it turned out later knew this was an abusive relationship, but because the agenda of couples counselling is for each party to air their concerns, and for the other party to see if they are willing to take them on board, the counsellor just kept this up and waited for me to figure out how abusive stbxh's behaviour was on my own.
Stbxh, by the way, was also following individual therapy of his own during that time. He still is. And he's still abusive and in denial about it.
Regarding the influence of books, in my case, I don't think that books influenced me. I had already seen that the situation just wasn't right, and just wasn't tolerable for me anymore, before I bought any books or started doing any research on abuse. What the books did do was clarify my confusion, because it is very confusing to suddenly realise that the man you love may not have your best interests at heart.
HappyDoll, I don't believe you are so weak-willed as to be swayed by books and websites beyond what you feel is reasonable.